which anime series have the best political insights in your opinion?
for example, if we were to take gundam 00. this anime focus so much on political ideas and other philosophical fantasies.
so which anime do you think that way and why?

I really can't think of any that are overtly political (my anime viewership is still pretty limited), but subtly, I think High School of the Dead has a lot of conservative/libertarian themes, if you look past all the fan service.

Space operas!
Titles like Crest of the Stars (The novels explaining even more about the universe), Tytania, Legend of the Galactic heroes, Five Star Stories, etc.
Those are bursting with political intrigue, war politics and the like.

On that note, Infinite Ryvius. It's been called "Lord of the Flies in space" (an apt comparison, in my opinion) and the kids do try different political/social systems over the course of the series, to varying degrees of effectiveness. Throw in some (literal) class warfare into the mix, and the whole thing becomes a total cluster.

Really delves into what is means to be a ruler of a kingdom and how to take care of your people and make your kingdom strong while being just. It has war, economics, strategy, betrayal etc.

Since the anime and light novels focus on different sides, you can really get a rounded view of things. Plus since it has so many characters of all ages, genders and even species, you can get a glimpse of the world through their eyes as well, and how they view it as individuals. You get to see things play out through the eyes of Emperors, rebels, students, peasants, mystical creatures, fallen princesses, evil usurpers, servants, people from other worlds...